The Solar System
Subject: General Knowledge | Topic: The Solar System
For TLT, ECT, PST, JEST & All Competitive Exams
Look up at the sky on a clear night, and you're looking at a tiny part of our cosmic neighborhood — the Solar System. Questions about planets, the Sun, and space facts are a regular and reliable feature of the General Knowledge section in TLT, ECT, PST, and JEST exams.
What is the Solar System?
The Solar System consists of the Sun at its center, along with all the celestial objects that orbit it due to its gravity — including eight planets, their moons, dwarf planets, asteroids, comets, and meteoroids.
The Eight Planets in Order from the Sun
The Eight Planets (In Order from the Sun)
| Position | Planet | Key Fact |
|---|---|---|
| 1 | Mercury | Smallest and closest planet to the Sun |
| 2 | Venus | Hottest planet due to its thick atmosphere |
| 3 | Earth | Only known planet to support life |
| 4 | Mars | Known as the "Red Planet" |
| 5 | Jupiter | Largest planet in the Solar System |
| 6 | Saturn | Famous for its large, visible ring system |
| 7 | Uranus | Rotates on its side, almost parallel to its orbit |
| 8 | Neptune | Farthest planet from the Sun |
Facts About the Sun
- The Sun is a star and the center of the Solar System.
- It is made mostly of Hydrogen and Helium.
- The Sun provides light and heat to all the planets, essential for life on Earth.
- Light from the Sun takes about 8 minutes to reach Earth.
Other Objects in the Solar System
- Moons: Natural satellites that orbit planets (Earth has one Moon).
- Dwarf Planets: Smaller planet-like bodies, e.g., Pluto (reclassified from a full planet in 2006).
- Asteroids: Rocky objects, mostly found in the Asteroid Belt between Mars and Jupiter.
- Comets: Icy bodies that develop a glowing tail when near the Sun.
Why This Topic Matters
The Solar System is one of the most classic and reliable General Knowledge topics, testing basic space facts that appear in almost every competitive exam. Its straightforward, memorable facts make it a high-scoring, low-effort topic for TLT, ECT, PST, and JEST exams.
Practice MCQs
1. Which planet is known as the "Red Planet"?
a) Venus b) Mars c) Jupiter d) Saturn
2. Which is the largest planet in the Solar System?
a) Earth b) Saturn c) Jupiter d) Neptune
3. Which planet is closest to the Sun?
a) Venus b) Earth c) Mercury d) Mars
4. Which planet is famous for its large ring system?
a) Uranus b) Saturn c) Neptune d) Mars
5. How many planets are there in the Solar System?
a) Seven b) Eight c) Nine d) Ten
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